Plz help Why might onset of the disorder prove irreversible?

A.
Onset of the disorder might prove irreversible because the nerves affected would be in the dysphagia center of the brain.
B.
The disorder might prove irreversible because of production of malformed proteins.
C.
The mutation causes a disruption in energy movement, which would prove irreversible due to paralysis.
D.
Continued production of misshapen ATP and transport proteins would be catastrophic to all body systems.

Here’s one way to follow the scientific method. place the missing steps in the correct position in the process

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?